Improvement in grain-separator



G. F. HARLAN.

Graih Separator.

Patented May 18, 1869.

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GEORGE. FJHAR'LAN, or ELKTON, MARYLAND.

Letters Patent No. 90,260, dated Mag 18, 1869.

IMPROVEMENT IN GRAIN-SEPARATOR.

The Schedule referred to in these Letters Patent and making part of thesame.

To all whom it may concern:

Be it known that I, GEORGE E. HARLAN, of Elkton, in the county of Cecil,and State of Maryland,

construction of a grain-separator, by means of which a greater amount ofthe impurities passing into the separator are removed from the grain,and at the same time less grain is allowed to pass outwith thescreenings, thereby saving a larger proportion of grain, and leaving itmuch cleaner than in the ordinary manner.

To enable those skilled in the art to make and use my invention, I willproceed to describe its construction and operation.

In the accompanying drawing A represents the case of the separator; B,the hopper in which the grain to be cleaned is placed; 0, an extensionof the case A, on its under side, and to this is attached a fan orblower of the ordinary construction. D designate partitions in the caseA, which are vertical, or nearly so.

These partitions do not extend quite up to the under side of the top ofthe case A, thus leaving a space between their upper ends and the top ofthe said case.

Above the case 0 is an inclined partition, E, its lower end being towardthe end of the case A, next to the hopper B. Its upper end extends up toabout the height of the upper ends of the partitions D.

There is, also, an opening between the tower ends of the partitions Dand the inclined partition E.

On the under side of a portion of the case A is an inclined piece orbottom, F, between the inner end of which and the case G is a slide, G,which is used to regulate the width of the aperture between the top ofthe case 0 and inclined partition E, by means of which the draught isregulated. I 4

On the upper side of the piece F is an adjustable screen-board, H, whichmay be either curved or straight. I

At the lower edge of this is an aperture, a, (through which thescreenings pass out,) in the end of the case A.

In this piece, or bottom E, are one or more setscrews, b, by means ofwhich the screen-board H is adjusted as desired.

0 c are gates, placed near the top of the space between one or more ofthe vertical partitions, which may be opened or closed at pleasure fromthe outside of the case A, in any desired manner.

At or near the bottom of the hopper B is an aperture, d, in the end ofthe case A, through which the grain to be cleaned passes into the saidcase from the hopper.

In the drawing the red arrows indicate the course of the grain, the bluearrows the course of the screen lugs, and the blackarrows the course ofthe dust and chafl.

Its operation is as follows:

The grain to be cleaned is placed in the hopper B. By revolving the fanthe air is drawn into the case A, through the aperture 6, in the bottomof the said case.-

The current of air thus drawn into the case passes up and over the topof the partitions D, down under the inclined partition E, through theaperture f into the case 0, and out of the fan-case.

As the grain enters the case A, the current of air carries the dirt inthe grain up over the partitions D, but most of the grain falls down andpasses out through the aperture e.

As the current of air is very strong, some of the grain will be carriedup over the iertical partitions, with the dirt, 860., and as it iscarried along, the grain, by its own gravity, will fall down between thepartitions, the heaviest falling into the space bet-ween the first andsecond partitions, the next heaviest into the next space, and so on.

After it falls into these spaces, it continues down to the inclinedpartition E, and then slides down that under the vertical partitions,and escapes through the aperture 0.

The screenings, chafi, and dust continue on, the screenings falling onto the screen-board H, and thence out through the aperture a, and thechaif and dust are drawn into the case 0, through the aperture 1, andescape through the fan-case.

If it is desired to :keep the different qualities of grain separate, thevertical partition can be continued down to the inclined partition E,and openings made in the sides of the case A for its removal.

- Having thus fully described my invention,

What I claim, and desire to secure by Letters Patent is- 1. The inclinedpartition E, when arranged and operating substantially as shown anddescribed.

2. The vertical partitions D, when arranged and operating substantiallyas shown and described.

3. The combination of the inclined partition E, vertical partitions D,and gates cc, substantially as shown and described.

4. The'combination of the slide G and case G, sub

